PLATE LXXXIV. 
Actinopteria zeta. 
Page 123. 
See Plate 23. 
Fig. 1. A large left valve of this species. 
Fig. 2. A smaller example preserving the surface ornamentation. 
Chemung group. Ithaca, N. Y. 
Actinopteria pusilla. 
Page 117. 
Fig. 3. A right valve of this species. 
Hamilton group. Canandaigua lake, N. Y. 
Actinopteria decussata. 
Page 111. 
See Plates 17, 18 and 20. 
Fig. 4. An enlargement of the surface of the specimen fig. 13, plate 18, showing the characters on another 
portion of the shell than represented in fig-. 14 of the same plate. 
Hamilton group. Western N. Y. 
Actinopteria tenuistriata. 
Page 120. 
Fig. 5. A left valve showing the usual characters. 
Fig. 6. An enlargement of the surface from another specimen showing the regular coarse rays with finer 
rays between. 
Chemung group. Ithaca, N. Y. 
Fig. 
7. An imperfect left valve. 
Chemung group. 
Actinopteria iota. 
Page 127. 
Ithaca, N. Y. 
Actinopteria eta. 
Page 124. 
Fig. 8. A left valve as obtained from an impression of the matrix, showing the characters of the surface. 
Fig. 9. A small left valve. 
Fig. 10. A right valve of this species, showing the form and character of the surface. 
Fig. 11. A left valve of medium size, somewhat narrowed by pressure, showing the cardinal expansions 
and surface markings. 
Chemung group. Ithaca, N. Y. 
Actinopteria perstrialis. 
Page 118. 
See Plate 23. 
Fig. 12. A right valve referred to this species. 
Chemung group. Ithaca, N. Y. 
Fig. 
13. A left valve. 
Chemung group. 
Actinopteria kappa. 
Page 128. 
Ithaca, N. Y. 
Actinopteria perobliqua. 
Page 116. 
See Plate 19. 
Fig. 14. The left valve of the specimen fig. 31, plate 19, showing the pallia! line and muscular impression 
with several umbonal scars. 
Hamilton group. Cazenovia, JV. Y. 
